The global surge protection device (SPD) market was valued at approximately $3.65 billion in 2024 and is projected to reach $5.55 billion by 2030, driven by the rapid expansion of data centers, smart infrastructure, renewable energy systems, and EV charging networks. With the adoption of IEC 61643 and NEC 230.67 standards becoming increasingly standard practice worldwide, specifying the right SPD manufacturer has become a critical decision for engineers and procurement professionals alike.
Below is a curated ranking of the top 10 global SPD manufacturers, ordered by market influence, with key company profiles, product highlights, and application guidance.
1. HIITIO
- Founded: 2018
- Headquarters: Hangzhou, Zhejiang Province, China
- Core Products: High-voltage DC surge protection devices, high-voltage DC contactors, semiconductor fuses, SiC/IGBT power modules, rapid shutdown devices, PV optimizers
- Website: https://www.hiitio.com
- SPD Product Category: https://www.hiitio.com/product-category/high-voltage-dc-devices/high-voltage-dc-surge-protection-device/
HIITIO (Zhejiang HIITIO New Energy Co., Ltd.) was established in 2018 by a dedicated R&D team introduced through Hecheng Electric, bringing decades of accumulated engineering expertise into a focused product line built around the demands of modern energy infrastructure. HIITIO has developed a well-structured portfolio targeting high-voltage DC applications in electric vehicle systems, photovoltaic power generation, and energy storage.
The company operates with a vertically integrated approach, maintaining control over key development and production processes to support consistent quality and responsive customization for international clients.
HIITIO’s DC surge protection lineup is designed specifically for high-voltage environments in solar, ESS, and EV charging applications. The HCDSP2-1000 T2 DC Surge Protector (1000VDC) delivers a discharge current capacity of up to 40 kA (8/20 μs waveform) with a response time of 25 nanoseconds, suitable for photovoltaic inverter input/output protection and combiner box applications.
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The HCDSP3-1500 (1500VDC) targets large-scale PV installations where system voltage requires robust overvoltage clamping under IEC/EN 61643-31. Both product lines incorporate high-energy MOV (Metal Oxide Varistor) chips that respond in nanoseconds to route transient energy safely to ground, protecting downstream inverters, storage systems, and monitoring equipment. These devices are available with remote monitoring and fault indication features, supporting system-level visibility in commercial and utility-scale deployments.
2. ABB
- Founded: 1988
- Headquarters: Zurich, Switzerland
- Core Products: Type 1, Type 2, and Type 3 SPDs; switchgear; circuit breakers; industrial automation systems
- Website: https://www.abb.com
ABB is one of the world’s leading technology companies in electrification and automation, with operations spanning more than 100 countries and a workforce exceeding 100,000 people. Its SPD portfolio supports a broad range of installation types — from residential distribution boards to utility substations and industrial control systems.
ABB SPDs are engineered in compliance with IEC 61643-11 and UL 1449 standards, making them deployable across global markets. The company’s scale enables it to offer integrated system solutions where surge protection coordinates with circuit breakers, motor drives, and power quality management systems under a single vendor architecture. ABB’s long-standing presence in utilities, transportation, data centers, and renewable energy installations gives its SPD product line a strong track record and broad geographic reference base.
3. Schneider Electric
- Founded: 1836
- Headquarters: Rueil-Malmaison, France
- Core Products: SPDs, circuit breakers, energy management systems, smart grid solutions, industrial automation
- Website: https://www.se.com
Schneider Electric is a global leader in energy management and automation, with annual revenues exceeding €35 billion and operations in over 100 countries. In the SPD segment, Schneider Electric offers a comprehensive range of devices covering residential, commercial, industrial, and critical infrastructure applications.
The company integrates SPDs with its broader EcoStruxure platform, enabling real-time surge event monitoring and energy management in smart building and industrial automation environments. Schneider’s emphasis on digital integration and sustainability-oriented engineering has positioned it well in markets where grid modernization and renewable energy expansion are creating new demands for overvoltage protection solutions.
4. Siemens
- Founded: 1847
- Headquarters: Munich, Germany
- Core Products: SPDs, low-voltage switchgear, building automation, industrial control systems
- Website: https://www.siemens.com
Siemens is one of the world’s largest industrial companies, with a portfolio that spans power generation, transmission, building technologies, and industrial automation. Its SPD products are positioned within a broader low-voltage switchgear ecosystem that includes SENTRON circuit breakers, RCCB devices, and energy monitoring systems.
Siemens SPDs comply with IEC 61643-11 and are used globally in building installations, transportation infrastructure, manufacturing facilities, and utility networks. The company’s extensive global distribution and service network support reliable product availability and technical assistance across major markets.
5. Eaton
- Founded: 1911
- Headquarters: Dublin, Ireland
- Core Products: SPDs, UPS systems, power distribution units, switchgear, EV charging infrastructure
- Website: https://www.eaton.com
Eaton Corporation is a diversified power management company with revenues exceeding $23 billion annually and a global workforce of approximately 92,000 people. The company’s electrical division offers one of the broadest SPD portfolios in North America, covering residential, commercial, and heavy industrial segments.
Eaton has been particularly active in expanding its SPD offering for EV charging infrastructure and data center applications in recent years. As the acquirer of Tripp Lite, Eaton has also strengthened its position in the IT-infrastructure surge protection segment. Its products meet both UL 1449 and IEC 61643 certifications, supporting deployment across North American and international project specifications.
6. Phoenix Contact
- Founded: 1923
- Headquarters: Blomberg, Germany
- Core Products: DIN rail SPDs, signal line surge protectors, industrial connectors, automation components, power supplies
- Website: https://www.phoenixcontact.com/en-us/
Phoenix Contact is a family-owned company with approximately 21,000 employees globally and annual revenues of approximately €3.4 billion. It is widely regarded as one of the most technically established surge protection device manufacturers in the field of industrial automation and control systems. Phoenix Contact offers a modular, system-oriented approach to surge protection, where SPDs for power supplies, signal lines, data cables, and fieldbus systems can be coordinated as part of an integrated protection concept.
The company’s TRABTECH product family spans hundreds of SPD variants, covering protection from DIN rail power supply inputs through to individual sensor and actuator circuit protection within control cabinets. Phoenix Contact’s technical documentation, application guides, and selection tools are recognized in the industry for their depth and engineering rigor.
7. DEHN
- Founded: 1910
- Headquarters: Neumarkt in der Oberpfalz, Germany
- Core Products: Type 1 / Type 2 / Type 3 SPDs, lightning protection systems, earthing and bonding products, safety equipment
- Website: https://www.dehn.de
DEHN is a specialist manufacturer with more than a century of focused experience in lightning and surge protection engineering. Headquartered in Germany and operating in more than 70 countries, DEHN reported annual revenues of approximately €470 million with over 2,500 employees. What distinguishes DEHN within the global SPD landscape is its combination of deep expertise in high-energy lightning current applications and its comprehensive, coordinated system approach — covering external lightning protection, earthing, equipotential bonding, and multi-stage internal SPD protection under an integrated design philosophy.
DEHN’s type-testing laboratory and dedicated application engineering resources support technically demanding projects in critical infrastructure, utilities, chemical processing, and outdoor telecommunications sites, where failure consequences justify more rigorous selection criteria.
8. Littelfuse
- Founded: 1927
- Headquarters: Chicago, Illinois, USA
- Core Products: SPDs, fuses, varistors, gas discharge tubes, PTC resettable fuses, automotive and industrial circuit protection
- Website: https://www.littelfuse.com
Littelfuse is a publicly traded global manufacturer specializing in circuit protection, power control, and sensing products across electronics, automotive, and industrial markets. The company’s SPD portfolio is notable for its strong semiconductor-based protection components, including metal oxide varistors (MOVs), gas discharge tubes, and transient voltage suppression (TVS) diodes, which underpin many of its finished surge protection devices.
Littelfuse SPDs are commonly specified in EV charging stations, solar PV systems, telecommunications base stations, industrial control equipment, and HVAC systems. The company’s component-level expertise means its finished SPD products often achieve low clamping voltages and fast response characteristics suited for protecting sensitive electronics. Littelfuse products comply with UL 1449, IEC 61643, and UL 96A standards.
9. CITEL
- Founded: 1937
- Headquarters: Paris, France
- Core Products: AC power SPDs, DC/PV SPDs, signal line surge protectors, telecom SPDs, gas discharge tubes
- Website: https://www.citel.fr
CITEL is a French manufacturer with nearly 90 years of experience in surge protection, recognized globally for its vertically integrated approach to SPD design. Unlike many competitors that source key protection components externally, CITEL designs its own gas discharge tubes, thermally protected varistors, and high-energy varistor assemblies in-house, providing direct engineering control over the core elements that determine an SPD’s clamping characteristics and longevity.
This approach has made CITEL a preferred supplier in telecom, renewable energy, residential, and commercial markets where component-level reliability data is relevant to procurement decisions. CITEL products are distributed across more than 80 countries and carry certifications including IEC 61643, UL 1449, and EN 50539.
10. Legrand
- Founded: 1860
- Headquarters: Limoges, France
- Core Products: SPDs, wiring devices, cable management, UPS systems, digital building infrastructure
- Website: https://www.legrand.com
Legrand is a global specialist in electrical and digital building infrastructure, with annual revenues exceeding €8 billion and operations in more than 90 countries. Its SPD portfolio is primarily oriented toward building infrastructure — residential distribution boards, commercial offices, data rooms, and smart building systems — where surge protection coordinates with Legrand’s wiring devices, circuit breakers, and energy monitoring platforms.
Legrand’s market position benefits from strong relationships with electrical contractors and building system integrators, supported by a broad product catalog and regional technical training programs. SPDs are offered as part of Legrand’s broader panel protection solutions, simplifying procurement for projects where a single vendor supply is preferred.
Ready to Protect Your System?
If your project involves photovoltaic systems, energy storage installations, or EV charging infrastructure, HIITIO’s DC surge protection devices are worth evaluating as a focused, technically certified option.
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Whether you need protection for solar inverter inputs, battery storage systems, or DC combiner boxes, HIITIO’s technical team can support product selection, customization, and rapid delivery. Visit https://www.hiitio.com to browse the current product range, request datasheets, or reach out directly to discuss your application requirements.
